Bar mill



Mamh w. WORTHINGTQN ,900,03

BAR MILL Origi nal Filed Oct. 25 19:50 3 Sheets-Sheet 1 INVENTOR March'7, 193.3. w WORTHINGTON 1,909,032

" BAR MILL Original Filed Oct. 25, 1950 3 SheetsTSheet 2 March '7, 1933.w WORTHINGTON BAR MILL s Sheets-Sheet 3 Original Filed Oct. 25

MNVEIYTIOR. B wa /mm 44", ATTORN EYS.

Patented Mar. 7, 1933 UNITED STATES PATENT OFFICE BABHILL Applicationfiled October 25, 1980, Serial 80. 491,217. lenewed lay 18,1338.

This invention relates to rolling mills and has for an object to producea mill which overcomes diificulties heretofore encountered with suchmachines. v

A more specific object is to produce a mill which is particularlyadapted for rod and bar mill work and which overcomes difficultiesencountered in connection with such work.

Rod. and bar mill products, as ordinarily rolled, are likely to befaulty, due to a lat-- occasioned by what is termed roll sprin Inrolling mills, as ordinarily constructe roll spring results from twocauses, viz., deflection of the reducing rolls when subjected to therolling pressures, and a bodily moving apart of those rolls in responsethe work- 0 ing strains to which they are sub ected. Roll spring, asabove defin is recognized in the design and. operation of rolling mills,but 1t 7 is difiicult to control and consequently it is diflicult withthe ordinary form of rod or bar mill, to roll products to the desiredthickness.

A specific object-of my invention is to pro-' duce an improved millwhich will unprove rod and bar mill products. v

The above, and other objects which will be made more apparent'throughoutthe further description of the invention, are attained by means of arollin mill embodying .the features herein descri 'd and illustrated inthe drawings accompanying and forming a part hereof. 4

, In the drawings, F gure 1 1s aside sectional view of a millembodyin myinvention, the view being taken on t 0 line 1- -1 ofFig.2.

Fig. 2 is an end elevation of the mill shown in Fig. 1. I

Fig. 3 is a more or less diagrammatic view of the adjusting mechanismfor the reducing rolls; and i Fig. 4 is a fragmentary sectional view ofa slightly modified embodiment of my invention, in which the scale ofthe drawings is increased for convenience of illustration.

Referring to the drawings, the illustrated embodiment of my inventionincludes a pair of workin rolls 55," which are illustrated as providewith grooves or matrices 6, forming the effective passer throat of therolls. These rolls are essentially convex' or barrelshaped in that theyare provided with convex peripheral surfaces on each side of the groovesor matrices. That is, each roll tapers .on a curved, convex surface fromthe effective pass or throat toward each end so that it is of greatestdiameter at the center and tapers to a smaller diameter at the ends.Each reducing roll is preferably bi-laterally symmetrical about thecenter line of its groove or matrix.

As illustrated, the rolls 5-5 overhang their sup rting bearings, and areso mounted that t ey are free to move laterally or axially anappreciable amount, but are located between backing rolls 7 and 7a,which are shownas concave rolls in that the periph- I eral surface ofeach roll is of greater diameter at the ends than at a point midwaybetween the ends of the roll, and tapers along acurved concave surfacetoward the intermediate portion of the roll. The concave surfaces ofeach backing roll are so formed that they correspond m curvature to theconvex surfaces of the reducin rolls and artially embrace a reducing r01 along the line of contact therewith, thus preventing relative axialmovement between each backing roll and the reducing roll engaged by it.I

The bac ing rolls are preferably of relatively largediameterascomparedto the reducv ing rolls, and are so constructed, bothas to the body of the rolls and the roll necks, as to preventappreciable deflection or yield under the stresses encountered duringthe rolling operation.

against lateral displacement and the inter- Each backing roll is somounted that lateral or axial displacement is substantially prevented.As shown in the drawings, this is accomplished by providing two forms ofbearings for each of the rolls, at least one of which operates in partas a thrust bearing in that it resists lateral or axial movement of theroll. With this arrangement the overhanging reducing rolls arereinforced by the rugged backing rolls so that the bearings of thereducing rolls are relieved of substantially all the working pressure towhich the reducing rolls are subjected during the operation of the mill.An important feature of this invention is the fact that the backingrolls are held meshing engagement between the opposed and contactingsurface of each reducing roll and its cooperating backing roll holds thereducing roll against lateral displacement during the operation of themill. This, as is apparent from the drawings, results from the fact thatthe engagement of the convex and concave surfaces of the reducing andbacking rolls, prevents the reducing rolls from moving laterally oraxially relatively to the backing rolls, and consequently preventsrelative lateral motion between the cooperating reducing rolls.

It will be apparent that the features above described may be included inrolling mills of 7 various design, and that therolls disclosed by thedrawings are illustrative merely, since material variations may be madein the size and in the shape of the various rolls without departing fromthe spirit and intent of my invention. It will also be understood thatthe working grooves or matrices may be omitted from one or both rolls,depending upon the character of the products to be produced by the mill,or that each roll may be provided with two or more grooves.

As illustrated, the mill includes a frame 9, which essentially consistsof a pair of standards 10 at the front of the machine, an intermediatepair of standards 11 and a rear extension 12 which terminates in a rearwindow 13. The various parts of the frame are cast or otherwiseassembled into a rigid structure. The standards 10 are located on eitherside of forward window similar in function to the windows employed inthe ordinary rolling mill. The standards 11 are located on either sideof an intermediate window which also corresponds in function to thewindows of theordinary mill. With this arrangement the mill is providedwith three windows, the forward, the intermediate and the rear window.

As illustrated, each working roll 5 is mounted on the overhanging end.of a spindle 14:, which in turn is journaled in a specially formedbearing block 15. Each bearing block 15 is provided with spaced bearings16 for the associated spindle and is so formed that it is per bearingbox 15 is held in place by adjust-' able members 17 and 18. The lowerbearing box" is adjustably supported by similar members 17a and 18a.With this arrangement the adjustable members are capable of holding thebearing boxes 15,and consequently the reducing rolls 5 in the desiredvertical position.

Any suitable means may be-employed for adjusting the positions of thesead ustable members, and, as shown, each of the members 17 and 17a issecured to its associated bearing block 15 by a socket connection andextends through a suitable guiding aperture formed in the frame. It isprovided at its outer end with an operating wheel 20, having a screwthread engagement therewith and so mounted in thrust bearings that aturning of the wheel will shift the member in one direction or theother, thus adjusting the position of the forward end of the associatedbearing box 15. It is apparent that ball and socket joints may beemployed between the members 17 and the boxes 15 or any other form ofconnection which wi ll permit slight angular motion between the memberand the box but will hold the box in the adjusted position. Each member18 and 18a is likewise provided with an operating wheel 21, but thewheel is mounted on the outer end of the member by means of afeather-key, so that it rotates with the member but is capable of movingor sliding along'the member. The member is threaded through a suitableaperture in the frame, so that its rotation changes its longitudinalposition. With this arrangement, turning the wheel, shifts thelongitudinal position of the member and thus positioning the outer endof the associated box 15 within its guides. These members 18 and18ainstead of being linked or otherwise secured to the associatedbearing boxes, merely abut against suitable lugs or abutments formed onthe boxes.

In Fig. 3 I have diagrammatically shown operating connections for thewheels 20 and 21. In both views of this figure the wheels arediagrammatically shown as worm gears and in the upper view, the twowheels 20 and 21 are shown in connection with an arrange ment, whereinthey may be operated separately. The wheel 21, meshing with a worm 22,carried on a shaft 23, which telescopes a hollow shaft 24. The shaft 24;carries a worm 25, which meshes with the gear 20. With this arrangementand with suitable operating levers or wheels for the shafts 23-and 24,the

ears 20 and '21 may be operated together or independently. In the lowerview of Fig. 3,

- bores and that any approved means ay the worms 22a and 250; are shownmounted on thesame shaft 23a and consequently both wheels 20a and 21dare operated when the shaft is turned. Either method of turning thewheels and. of thereby adjusting the'posi tions of the bearing boxes 15may be em ployed. The operating handles for the wheels 20, 20a, 21 and21a may be and preferably are placed at the front of the mill, so thatthe position of the reducing rolls 5 may be lreadily adjusted from thefront of the mi 1.

The spindles 14 are shown tapered at their forward ends. This is for thepurpose of simplifying the operation of mounting the reducin rolls 5 inplace on the spindles and it is, 0 course, understood that these rollsare provided with correspondingly tapered employed for obtaining a rigiddriving connection between the rolls and the spindles. It is desirablethat each spindle be a driven spindle and for this reason both spindlesare shown provided with coupling. boxes 27, but the coupling boxes areso arranged that each spindle is capable of shifting axially in itsbearings.

The backing rolls are, of course, of rugged or strong construction. Itis desirable to make them as short as practical between their necks orbearings and it is also desirable to provide them with large andrelatively stifi' necks, the reasons for which are all clearlyunderstood in rolling mill design. In Figure ;1 of the drawings I haveshown each backing roll as provided with one straight bearing 28 and onedouble conical bearing 29. The double conical bearing is employed toresist lateral displacement of the backing roll during operation.Bearing boxes are provided for the backing roll and these boxes may bemounted in the forward and intermediate windows of the frame in theusual manner of mounting the rolls in a mill. It is, of course,understood that the bearing boxes are so formed that the rolls arealigned by the standards 10 and 11, which form a way in which the lowerbearing housings may be guided, during the operation of adjusting thepositionvof the lower backing roll.

In the drawings I have shown the bearing housing. for both ends ofthelower backing roll 7 a as forming one integral structure, viz.,

the bearing box structure 30. A similar bearing box structure 31 is alsoprovided for the 7 upper backing roll 7. The backing roll 7a isvertically adjustable along the ways formed by the standards 10 and 11so as to efiectively'bring the backing rolls into operative relationwith the reducing rolls. Any suitable structure may be employed for thispurpose andin the drawings I have diagrammatlcally shown adjustablestruts 32 for moving the bearing housing'30 to position and forsupporting the housingv in position. As there shown, each strut is shownthreaded through a suitable aperture in the mill frame and is rovidedwith an operating wheel 33, which 1s feather-keyed onto the strut nearits lower' end. Each wheel is diagrammatically illustrated as a wormwheel, and is adapted to mesh with a separate worm mounted on a shaft35. The shaft 35 is preferably operat-- ed from the front of the mill bya sultable hand wheel not shown.- With this arrangement the position ofthe bearing box 30 may be varied by turning the shaft 35, therebyvarying the position of both struts, but it will be apparent that eachstrut may be independently adjusted.

As shown, the bearing box 30 is provided with flanges 30a along eachside, which overlap the standards 10, and determine the posibe tion ofthe box 30 within the forward and intermediate windows. Clamps 30b actbetween the frame and the flanges to rigidly hold the box in the properendwise or lateral position. The clamps are held in place by bolts whichextend through slots formed in the clamps. It will,of course, beunderstood that the faces of the windows or standards are milledin'order to provide an accurate guide for the bearing box, and that the00- operating portions of the box are also accurately milled.

The bearing box 31 for the upper backing roll is not verticallyadjustable. It is adapted to be clamped and held in position againsttheupper arch 34 or cap of the mill. Its lateral position" is alsoimportant and for this reason I .have illustrated a mechanism 35 foradjusting the lateral position of the bearing box and for holding itrigidly in place. As

shown, the mechanism 35 consists of a plate 36 which is rigidly securedto the frame bymeans of bolts 3601 A sleeve nut 37 is threaded throughthis plate, and a tension bolt 38 extends through this sleeve. The bolt38 is provided with a head 39 which engages a recess formed in the box31-. The sleeve nut '37 abuts against the box -31 and .is provided n't.I

curately adjusted and the counter-action between the sleeve nut 37 andthe bolt 38'will rigidly hold the box in the adjusted position. It will,of course, be understood that means such as the usual wedges 31a (Fig.2) may be employed for forcing and holding the box-.31

upwardly against the arch or cap 34 014%10. frame. In Fig. 21 have alsodisclosed gui e clips 10a which,'if desired, maybeemployed as anadditional means for rigidly holding the box in place.

As shown in Figure 1, the box- 31 is preferably made in two parts, forconvenience. of removingv the roll 7 therefrom. The lower portion 31b ofthe box is preferably secured to the upper portion by means of bolts,not shown.

In a mill such as diagrammatically illustrated in Figs. 1 and 2 of thedrawings, the reducing rolls may be readily changed for the purpose ofrolling different forms of products but it will, of course, beunderstood that the peripheral faces of each reducing roll willcorrespond in contour so as to effectively cooperate with the backingrolls and thereby prevent accidental and undesired lateral displacement.It will also be understood that the usual practice will be adhered to informing the working grooves or matrices in the rolls and that the rollsmay be spaced apart to provide a definite predetermined roll set.

From the foregoing it is apparent that by providing the reducing rollsand their backing rolls with proper cooperating surfaces the reducingrolls may be effectively held in the desired position throughout theoperation of the milland at the same time may be of relatively smalldiameter and mounted on sp1ndies of relatively small diameter, since thehacking rolls function to not only transmit substantially all therolling pressure to the frame, but also to so hold the reducing rollsthat appreciable lateral play or displacement of these rolls isprevented throughout the operation of the mill.

The fact that the reducing rolls are provided with convex reducingsurfaces, whereas the cooperating and contacting backing rolls areprovided with concave surfaces makes it apparent that there isnecessarily a certain amount of sliding or slipping between thecontacting surfaces of each reducing roll and its cooperating backingroll. It is apparent that the portions of the peripheral surfaces of thereducing rolls which are of greatest diameter travel at a greaterperipheral speed than the portions of those surfaces of smallerdiameter, whereas the reverse is true of the backing rolls. It is,therefore, apparent that the rolling -friction between each backing rolland its cooperating reducing roll is somewhat increased by reason of thefact that the rolls contact along a curved line or along hnes which arenot parallel to the axes of the rolls. This slight increase in rollingfriction cannot be avoided, but it can be minimized by prop- I erlyproportioning the contacting surfaces and by so selecting the degree ofconvexity of the reducing rolls and the corresponding concavity of thebacking rolls as to provide 1ust sufficient surface vto effectivelyprevent the lateral displacement of the reducing rolls without undulyincreasing the pressure per inch between the reducing rolls and thebacking rolls.

In Fig. 4 of the drawings I have shown a modified form of my invention,in which the peripheral surfaces of the rolls are somewhat differentfrom-those of the rolls shown in Flg.

14 and the backing rolls 7 are mounted in roller bearings. It will beapparent that each spindle will be provided with two such bearingslocated and arranged as illustrated in Fig. 1, and that the spindlesmust be capableof moving laterally with relation to their bearings.

While the backing rolls 7' of Fig. 4 are somewhat different in contourfrom those shown in Fig. 1, the same principle is followed.Theintermediate portion of each roll is of reduced diameter so thatthere is no contact between the portion of each reducing roll and itscooperating backing roll immediately adjacent to the edges of the grooveor matrix in the reducing roll. The lateral peripheral surfaces of thebacking rolls are concave, increasing in diameter from the intermediateportion toward the ends of the rolls and along a curved line whichcorresponds to the lateral curvature of the convex peripheral faces ofthe reducing rolls. In this respect, the rolls are similar to thosedisclosed in Fig. 1 and byemploying such concave and convex surfaces asare illustrated. the axes of the reducing rolls may be out of parallelwith the axes of the backing rolls, without damaging the surfaces of therolls and without materially increasing the rolling friction betweeneach reducing roll and its cooperating backing roll.

As previously stated, each spindle 14 is provided with two rollerbearings 16 and each backing roll is provided with roller bearings 28'and 29'. As shown, the bearmgs 28 are especially constructed so as toconform in function to the double conical bearings illustrated inFig. 1. This is accomplished by providing each bearing 28 with two setsof rollers in which the axes of the rollers of each set are inclined tothose of the rollers of the other set, and so that the two sets ofrollers cooperate with a double conical surface formed as a part of theroll neck, thus acting as a double thrust bearing and preventingappreciable lateral displacement of the backing roll. The bearings 29are shown as straight roller bearings. It will, of course, be apparentthat any form of anti-friction hearing may be employed so long asprovision is made to prevent lateral displacement of the backing rolls.

The operation of assembling the rolls in a mill such as illustrated issomewhat similar to the corresponding operation in connection with anordinary two-high mill. It is, however, desirable to properly locate thebearing box for the upper backing roll against the cap lower bearing boxis then rigidly clamped in I position. The upper hearing box may then beadjusted laterally for the purpose of adj usting the upper reducing rollto the proper so, curved lines and I prefer forming the conomissions maybe made in the apparatus illuslateral or endwise position with relationto the lower reducing roll. After'all the adjustments are properly madethe reducing rolls will be held in the desired operating positions bythe backing rolls and will be prevented from relative displacement withrelation to each other by the coacting surfaces of their respectivebacking rolls.

It will be apparent that. the concave and convex surfaces of the backingrolls and reducing rolls may be tapered along curves other than thoseshown and described, It is preferable, however, to employ concave convexsurfaces which are tapered along cave convex surfaces as illustrated andde-' scribed in connection with Fig. 4.

It will be apparent that various changes, substitutions, modifications,additions and trated without departing from the spirit and scope of myinvention.

What I claim is:

1. In combinationina rollin mill, :1. pair of coacting reducing rolls,eac having peripheral surfaces which are .tapered from a circumferenceof large diameter at a point intermediate the ends of the roll to acircumference of smaller diameter at a point adjacent the end of theroll, and a-pair of cooperating backing rolls of larger diameter thanthe reducing rolls, each-such backing roll en,- gaging one, of saidreducing rolls and so formed as to contact therewith along the taperedportion thereof.

2. In combination in a rolling mill, a pair of-coacting reducing rollshaving peripheral faces which diverge along a curved line from a pointadj acentthe throat of the rolls toward the ends thereof, and apair ofcooperating backing rolls having peripheral surfaces so formed astoicontact with the peripheral surfaces of said reducing rolls along acurved line, whereby relative lateral motion is prevented between eachreducing roll and its c'ooperating backing roll,and means. for limit--ing lateral motion of the backing rolls during their'rotation.

3. In combination in a rolling mill, apair of coacting reducing rolls,each'cap'able of lateral movement along the line of the axis of" itsrotation and'each having a peripheral surface tapering from acircumference adjacent the throat thereof to a circumference of smallerdiameter adjacent the end thereof, and a pair of cooperating backingrolls, each having a peripheral surface substantially conforming incontour to the contacting peripheral surfaces of the coacting reducingrolls and correspondingly tapering from a circumference of smalldiameter at a point intermediate the ends of the backing roll to acircumference of larger diameter at a point adjacent the end thereof,and means for limiting axial movement of saidbacking rolls during theirrotation. v

4. In combination in a rolling mill,'a pair of coacting reducing rolls,each having pe'- ripheral surfaces tapering along a curved line from acircumference adjacent the throat thereof toward circumferences ofsmaller diameter adjacent the ends thereof, and each so mounted in itsbearings that it is capable of lateral or endwise movement durrolls,each having a lateral peripheral surface conforming in contour tolateral surfaces of its coacting reducing roll, means for driving saidreducing rolls and means for opposing lateral motion of said backingrolls during their rotation.

'ing rotation, a pair of cooperating backing 5. In combination in arolling mill, a pair of coacting reducing rolls, each overhanging itssupportin bearings and each having a fperipheral sur acetapered from acircum erence intermediateits ends, to a circumference of smallerdiameter adjacent its end, a pair of backing rolls cooperating with saidreducing rolls and each provided with a peripheral surface tapered froma circumference of large diameter adjacent the end of the roll to acircumference of smaller diameter at a point intermediate the ends ofthe roll for cooperating with the tapered surface of the engagedreducing roll, and means for limiting the lateral or endwise movement ofeach backing roll during its rotation.

' 6. In combination in a rolling mill, a pair of reducing rolls, eachoverhanging its supporting'bearings and each capable of lateral orendwise movement during rotation and each having a peripheral surfacetapering on a curved line from a circumference intermediate its ends toa circumference of smaller diameter adjacent its end, a pair of backingrolls, each provided with a peripheral surface tapering along a curvedline from a circumference of large diameter adjacent an end of the rollto a circumference of small diameter intermediate the ends thereof forcooperating with the tapered surface of the hoacting reducing roll, andmeans'for limitin thelateral or endwise motion of each bac ing rollduring its rotation.

having a forward, an intermediate and a rear 1 window, a pair of rollspindles, a separate bearing box of each spindle guided by theintermediate and rear windows and adjustable therealong to diiferentpositions, a reducing roll carried on the overhanging end of eachspindle, a pair of backing rolls cooperating with said reducing rolls,the contacting surface of each reducing roll and its cooperating backingroll being such as to op-,

pose lateral displacement of the reducing roll with relation to thebacking roll, bearing boxes for said backing rolls mounted in theforward and intermediate windows of said frame, and at least one thrustbearing for each backing roll for opposing lateral or endwise movementthereof during its rotation.

9; In combination in a rolling mill, a pair.

of roll spindles, a separately adjustable bearing box for each spindle,a reducing roll carried by the overhanging endof each spindle, a pair ofbacking rolls cooperating with said reducing rolls, the contactingsurface of each reducing roll and its cooperating backing roll extendingat an angle to the axes of both rolls, a double tapered bearing for eachbacking roll, and means for adjusting the endwise position of onebacking roll.

10. In combination in a rolling mill, a pair of roll spindles, means forseparately adjust ing the position of each spindle, a reducing rollmounted on the overhanging end of each spindle, a pair of backing rollscooperating with said reducing rolls, the contacting surfaces of eachreducing roll and its cooperating baekin roll extending at an angle tothe axes 0 both rolls, means for adjusting the lateral position of oneof said backing rolls, and a thrust bearing for each backing roll.

1.1. In combination in a rolling mill, a pair of roll spindles, bearingstherefor through which said spindles are endwise movable, a reducingroll mounted on the overhung end of each spindle,- a pair of backingrolls, the contacting surfaces of each reducing roll and its cooperatingbacking roll being so formed as to prevent lateral motion of eachreducing roll relatively to its cooperating backing roll, means at thefront of the mill for adjusting the vertical positions of said bearings,means at the front of the mill for adjusting the lateral position of oneof said backing rolls, and thrust bearings for preventing endwise move.-

ment of both backing rolls during their rotation. I

12. In combination in a rolling mill, a pair of reducing rolls, a pairof backing rolls, the contacting surfaces of each reducing roll and itscooperating backing roll being such as to limit the relative endwisemotion between each reducing roll and its cooperating backing roll,anti-friction thrust bearings for said backing rolls and means foradjusting the lateral position of one backing roll.

13. In combination in a rolling mill, a pair of reducing rolls, eachreducing roll being so journaled that it is capable of endwise motion,and having a convex peripheral surface tapering along an arc of a circlefrom a circumference of large diameter at a point intermediate the endsof the roll to a circumference of smaller diameter at a point adjacentthe end of the roll, a pair of backing ro ls, each having a.corresponding concave peripheral surface tapering along an arc of acircle from a circumference of large diameter adjacent the end of'theroll to acircumference of smaller diameter at a point intermediate theroll, means for opposing endwise movement of each backing roll duringits rotation and means for adjusting the lateral position of one of saidbacking rolls.

14. In combination in a rolling mill, a pair of reducing rolls, each sojournaled that it is free to move endwise, a separate backing rollcooperating with each reducing roll, the contacting peripheral surfacesof each reducing roll and its cooperating backing roll being so formedas to oppose relative endwise motion between the rolls, means foropposing the endwise motion of each backing roll during its rotation andmeans for adjuiiting the endwise position of one backing ro 15. Incombination in a rolling mill, a pair of roll spindles, bearingstherefor in which the spindles are free to move in an endwise direction,means for adjusting the vertical positions of said bearings, a reducingroll mounted on the overhung end of each spindle, aseparate backing rollcooperating with each reducing roll, the contacting peripheral surfaceof each reducing roll and its cooperating backing roll being so formedas to oppose endwise motion of each reducing roll relatively to itscooperating backing roll, means for opposing the endwise motion of eachbacking roll and means for adjusting the endwise position of one backingroll.

16. In combination in a rolling mill, a pair of reducing rolls,'each sojournaled that it is movable endwise with relation to its bearings,bearings for said rolls, means for adjusting the relative positions ofsaid bearings, a separate backing roll cooperating with each reducingroll, the contacting surfaces of each reducing roll and its cooperatinghacking roll being such as to oppose relative of reducing rolls, each sojournaled that itis' movable endwise with relation to its bearings,bearings for said rolls, means for adjusting the relative positions ofsaid bearlngs, a separate backing roll cooperating with each reducingroll, the contacting surfaces of each reducing roll and its cooperatingbacking roll being such as to oppose endwise relative motion between thecooperating rolls, and means for opposing the end wise motion of thebacking rolls during their rotation. I

18. In combination in a rolling mill, a

frame, a pair of roll spindles, separately ad- 'justable bearings forsaid spindles mounted on the frame, a reducing roxl carried by theoverhanging end of each spindle, a separate backing roll cooperatingwith each reducing roll, bearings for the backing rolls mounted.

on said frame, means for adjusting the position of the bearings of onesuch backing roll along said frame, and means for adjusting thepositions of said spindle bearings along said frame. g

19. In combination in a rolling mill, a pair of reducing rolls, separatebearings for said rolls, means for adjusting the relative positions ofsaid bearings, a separate backing roll for each reducing roll,adjustable means for adjusting the endwise position of one reducing rollrelatively to the other, and means for opposing endwise movement of saidrolls during their rotation.

20. In combination in a rolling mill,'a pair of reducing rolls, each sojournaled that it is free to move endwise through its bearings, separatebearings for said rolls, means for adjusting the positions of saidbearings, a separate backingdoll for each reducing roll, means foradjusting the position of one such backing roll toward and away from theother backing roll, means for adjusting the endwise position of one suchreducing roll relativelyto the other during the operation of the mill,and means for opposing the relative-endwise movement of said reducingrolls during their rotation.

21. In combination in a rolling mill, a frame having a forward, anintermediate and a rear window formed therein, a pair of roll spindles,a separate bearing boxfor each spindle, guided by the intermediate andrear windows of the frame, means for adjusting the position of eachs'uchbox along said windows, areducing roll carried by the over- I hangingend of each spindle, a separate backing roll for each reducing roll,bearing boxes for the backingrolls mountedin the forward andintermediate windows of the frame, and means for adjusting the positionof one such backing roll along said front and intermediate windows. I

22. In combination in a rolling mill, a frame having bearing guidesformed therein, a pair of roll'spindles, bearing boxes for said spindlesmounted in bearing guides in said frame, a reducing roll mounted on theoverhanging end of each such spindle, means for adjusting the positionof each such bearing box along its cooperating bearing guides, aseparate backing roll for each reducing roll, bearings for each backingroll movable along bearing guides of the frame, means for lock- 7 ingthe bearings of one such backing roll in osition on said frame, andmeans foradthe position of the bearings of the justing) other ackingroll along the-cooperating roll for each reducing roll, eachbacking'roll having peripheral surfaces conforming 1n contour .to theperipheral surface of the cooperating reducing rolls, andmean foropposing the lateral motion ofsai backing rolls during their rotation, A

24. In combination in a rolling mill, a pair of roll spindles, bearingstherefor through which the spindles are movable longitudinally, meansfor adjusting the positions of said bearings, a reducing roll mounted onthe overhung end of each spindle, a separate backing roll for eachreducin roll, the contacting peripheral surfaces 0 each reducing rolland its cooperating backing roll being so formed as to oppose relativeendwise motion between said cooperating rolls, and v means for opposingendwise motion of each backing roll during its rotation.

25. In combination in a rolling mill, a frame, a pair of roll spindlesjournalled in said frame, means for adjusting the position of one suchspindle with relation to the other,

a separate reducing roll mounted on'the overhanging end of each suchspindle, a separate backing roll for each reducing roll j ournalled insaid frame, means for adjusting one such" backing roll toward and awayfrom the other, and means for opposing endwise movement of said rollsduring their rotation.

:26. In combination in a rolling mill, :1.

. frame, a pair of roll spindles, spaced bearings for each such spindle,carried by said frame, means for adjusting the position of thebearingsof one such spindle within said. frame,

- a separate reducing roll mounted on the overhanging end of each suchspindle, a separate backing roll for each reducing roll and means I foradjusting one backing rolltoward and away from the other backing roll.

27. In combination in a rolling mill, a

frame, a pair of'roll spindles journalled. in

. its cooperating backing roll being such as to oppose endwise lateralmotion between the cooperating rolls, means for adjusting the endwiseposition of one such backing roll during the operation of the mill,means for adjusting one such backing roll toward and away from theother, and means for opposing endwise lateral motion of said backingrolls during their rotation.

28. In combination in a rolling mill, a frame, a pair of roll spindlesjournalled in said frame, a separate reducing roll mounted on theoverhanging end of each such spindle, at least one of said rolls havinga working groove formed therein, a separate backing roll for eachreducing roll journalled in said frame, at least one such backing rollbeing recessed opposite the groove in its cooperating reducing rolls andthe contacting surfaces of such reducing roll and its cooperatingbacking roll being such as to oppose-endwise motion between thecooperating rolls, means for adjusting the position in said frame of onesuch backing roll toward and away from the other backing roll, meansaccessible during the-operation of the mill for adjusting the 40 endwiseposition of one such backing roll and means for opposing endwise motionof said backing rolls during their rotation.

29. In combination in a rolling mill, reducing rolls, bearings therefor,means for adj usting the relative positions of said bearings, a backing'roll for atleast one of said reducing rolls, the contacting surface ofsuch backingroll and its cooperating reducing roll being such as tooppose relative endwise motion between such rolls, means for adjustingthe endwise-position of such backing roll to adjust the endwise positionof the cooperating reducing roll, means for adjusting the operatingposition of one reducing roll toward and away from the other, and meansfor opposing endwise movement of saidrolls during their rotation.

I 30. In combination in a rolling mill, a

frame, a roll spindle journalled in said frame,

means for adjusting the angular position of said spindle, a reducing'roll mounted on the overhanging end 'ofvsaid spindle and capable ofendwise movement, a backing roll for said reducing roll, the contactingsurfaces of said rolls being such as to oppose relative endwise motionbetween said rolls, means for adjusting the endwise position of saidbacking roll to adjust the endwise position of said reducing roll, asecond reducing roll journalled in I said frame, means for adjusting theoperating position of one reducing roll toward and away from the other,and means for opposing endwise movement of said rolls during theirrotation.

In testimoriy whereof, I have hereunto described my name this 17th dayof October, 1930. 4 1

WARREN WQRTHINGTON.

